Amazon India — product not delivered, but amazon.in website shows delivered

Address:

411012

I had placed 2orders on amazon.in website. One of the order was a mobile cover which was delivered. However the other order was for a samsung mobilephone which was not delivered.in spite of calling mumbai customercare number +[protected] multiple time, i could not speak, since the phone was disconnected with a response that amazon customercare care will call me back. More over i was surprised to see on the website amazon.in website that my order has been delivered. Amazon also shared a courier tracking. Number as below
Courier: amazon transportation services, tracking #:[protected]

I never had such an experience in last 4 years. Not sure what is the issue

If anybody can help me please do so

Thanks
Prashant